How To Fix UCF8051 - Automatic line items contain an error; posting is not possible

UCF8051 - Overview

• Message type: E = Error

• Message class: UCF8 - Messages for Manual Journal Entry

• Message number: 051

• Message text: Automatic line items contain an error; posting is not possible

What causes this issue?

Posting is not possible because the automatic line items contain errors.
The original and automatic line items are not consistent since the
characteristics have been changed.

System Response

The document cannot be posted.

How to fix this error?

Start the manual posting task again and re-enter the original line
items. Then you can generate the automatic line items correctly,
enabling the document to be posted.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

UCF8051 - Details

• The SAP error message UCF8051, which states "Automatic line items contain an error; posting is not possible," typically occurs during the posting of financial documents when there are issues with the automatic line items generated by the system. This error can arise in various contexts, such as during the posting of invoices, payments, or other financial transactions.
  Causes:
  
  Incorrect Account Assignment: The automatic line items may reference accounts that are not valid or are not set up correctly in the system.
  Missing or Incorrect Configuration: The configuration for automatic postings (e.g., in the Financial Accounting module) may be incomplete or incorrect.
  Currency Issues: There may be discrepancies in currency conversion or currency settings that prevent the posting from being completed.
  Document Type Issues: The document type being used may not be configured to allow the type of posting being attempted.
  Missing Master Data: Required master data (e.g., vendor or customer accounts) may be missing or incorrectly